[phas-grad] [phas-dept] Nov 8 (Thursday) 4 PM - Physics and Astronomy Colloquium

[Heungman Park]

Fall 2018 Colloquium

Department of Physics & Astronomy, TAMU-Commerce

Nov 8, Thursday, 4-5 PM in Science Building 127

(coffee and cookies will be served at 3:50 PM)

Astrophysics, Nuclear physics

Mass Generation in the Early Universe
Dr. Ralf Rapp

Texas A&M University - College Station

[https://urldefense.proofpoint.com/v2/url?u=https-3A__lh5.googleusercontent.com_m6mO55Zct8ILWNYzXiceQc8zRvvV0S9AZu75dW0yfyPi-2DGuXbC5mtRqTEczgtCZVkdi1aRS-2DkrIlT32OhdCE17Og4HxLl-2DPCHc63oaB8WmkShm-5F8BbvECwqyVA0UkM2kUn42ZnRH&d=DwIFAw&c=oqyuZuih6ykib6aKiBq22_bich4AVfYGoLertJN0bEc&r=hjwEO_XYlnwAQWUGeaCrW47w4mK-Al28-BKyRvaivBs&m=HlXWmzxerP2xcZ959Vs9nlDj2cu_N4z19Qp1AcJmh-w&s=YkRIHjl0ljC2qJ0__0H0xs0pL6AbF15i_R6Om6wuRHk&e=]

Dr. Rapp earned MS (1993) degrees in Physics at the University of Bonn Germany, and a Ph.D. degree (1996) in Physics at Univ. of Illinois (Urbana-Champaign). His Ph.D. research topic was on Theoretical Nuclear/Hadron Physics. He worked as a post-doc at : Research Center Julich, Theo and SUNY at Stony Brook. In 2003, Dr. Rapp began his appointment as an assistant professor at Texas A&M University - College Station, where he is currently doing research in Astrophysics Nuclear physics. More information about Dr. Rapp and his research can be found at https://urldefense.proofpoint.com/v2/url?u=https-3A__physics.tamu.edu_people_rrapp_&d=DwIFAw&c=oqyuZuih6ykib6aKiBq22_bich4AVfYGoLertJN0bEc&r=hjwEO_XYlnwAQWUGeaCrW47w4mK-Al28-BKyRvaivBs&m=HlXWmzxerP2xcZ959Vs9nlDj2cu_N4z19Qp1AcJmh-w&s=E5fwDPAuKA79_fdNgqQ0gkjYAgmAfoNLj_vO6Vcld0A&e=




Abstract

In the framework of the Standard Model of elementary particles, the generation of the  visible mass in the Universe is closely related to condensation phenomena of originally  massless partciles and fields. These mechanisms, in turn, are believed to be accompanied by phase transitions associated with the fundamental forces in Nature. In the electroweak  phase transition, at about 10 picoseconds after the Big Bang, the recently discovered Higgs Boson condensed, giving rise to large W- and Z-boson masses, but to only small masses of  the light up- and down-quarks. On the other hand, in the strong-force transition, at about 10 microseconds after the Big Bang, quark and gluon fields condensed giving rise to the confimenent of color charges into hadrons, and generating ~98% of their mass. We discuss  ideas and possible mechanisms underlying these phenomena, and how they can be tested, 14 billion years later, in the laboratory using high-energy collisions of heavy nuclei.




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